> Software usability, in this context, is measured objectively, there is no interpretation.
What is the objective measure of usability to which you are referring? I'm not aware of any such metric.
> As for your high standards vs tendonitis distinction, I'd say these things are not mutually exclusive, and the comparison is not related to what we're talking about.
The connection is that I have different needs in HIDs, just like some people have different needs in Obsidian. There are great ergonomic keyboards available for $50. I just can't use them.
Generally I buy the cheapest peripherals available. My standards are not all that high. Several of them have bugs I've learned to work around.